Question

A vector drawn 15 mm long represents a velocity of 30 m/s. How long should you draw a vector to represent a velocity of 20 m/s ?

Answer 1

10 mm

Explanation:

we know that

A vector drawn 15 mm long represents a velocity of 30 m/s

so

using proportion

Find out how long should you draw a vector to represent a velocity of 20 m/s

Let

x -----> the length of a vector that represent a velocity of 20 m/s

`(15)/(30)(mm)/((m/sec))=(x)/(20)(mm)/((m/sec))\\\\x=15(20)/30\\\\x=10\ mm`